plugins: more explicit header inclusion

32-bit Debian doesn't have these included by other includes
already and needs them explicitly.

CMakeLists-implied-options.txt

@@ -235,6 +235,7 @@ endif()
 if (LWS_WITH_PLUGINS AND NOT LWS_WITH_LIBUV)
 message(STATUS "LWS_WITH_PLUGINS --> Enabling LWS_WITH_LIBUV")
  set(LWS_WITH_LIBUV 1)
+ set(LWS_WITH_EVENT_LIBS 1)
 endif()
 
 if (LWS_WITH_PLUGINS OR LWS_WITH_CGI)

plugins/protocol_lws_raw_test.c

@@ -74,6 +74,8 @@
 #include <string.h>
 #include <fcntl.h>
 
+#include <sys/stat.h>
+
 struct per_vhost_data__raw_test {
 	struct lws_context *context;
 	struct lws_vhost *vhost;

plugins/protocol_lws_sshd_demo.c

@@ -29,6 +29,7 @@
 #include <string.h>
 #include <stdlib.h>
 #include <errno.h>
+#include <fcntl.h>
 
 #define TEST_SERVER_KEY_PATH "/etc/lws-test-sshd-server-key"